Vehicle-spring



(No Model.)

J..W. WBTMORE.

VEHICLE SPRING.

Patented SepkgZQ, 1892.

E e E J 0 .C. m I m- C A E- E Q WIL EEEEE.

NITED STATES PATENT OFFIcE.

JEROME W. \VETMORE, OF ERIE, PENNSYLVANIA.

VEHICLE-SPRING.

SPECIFICATION forming part of Letters Patent No. 482,933, datedSeptember 20, 1892.

Application filed May 18, 1891. Serial No. 393,145. (No model.)

To all whom it may concern:

Be it known that I, JEROME W. WETMORE, a citizen of the United States,residing at Erie, in the county of Erie and State of Pennsylvania, haveinvented certain new and useful Improvements in Vehicle-Springs; and Ido hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to the letters of reference markedthereon, forming part of this specification.

My invention relates to improvements in vehicle-springs which aremovably placed on the bolsters of wagons and the bolster-plates on whichthey rest.

The objects of my improvements are, first, to simplify the constructionof torsion bolster-springs; second, to remove in a considerable degreethe forward and backward strain of the load from the stakes to thebolster; third, to secure a uniform shortening of the leverage of thetorsion-spring as the weight of the load is increased or the depressionof it from concussion is greater, and, fourth, to secure a bolster-plateadjustable to the width of the bolster. I attain these objects by theconstruction illustrated in the accompanying drawings, in which- Figure1 represents sections of the back end or forward end of the body of thewagon, the bolster, bolster-plate, and spring; Fig. 2, a section of theside of the body and a crosssection through 00 m, Fig. 1; Fig. 3, a viewof the spring and the spring-board, looking up from the under side;Figs. 4 and 5, vertical views of the two parts of the bolster-plate;Figs. 6 and 7, cross or side views of the two separate parts of thebolster-plate; Fig. 8, an enlarged View of the side of the bolster-plateas seen on E, Fig. 1, but the clips 7c have not been bent down over theribs 0.

A is the body of the wagon; b, the springboard; c, the spring; 0', thespring after depression; d, the spring-board in a new position by theweight of a heavy load; E, the axle-tree; f, the sides of thebolster-plate; 9,

Figs. 1 and 2, the steel friction rod or plate held in place by end lugsand clips i; h, a plate on the spring-board to hold the spring andreceive its pressure; 1', the clips which are bent over the steelfriction-block g; k, the clips of the section, Figs. 5 and 7, which arebent over the ribs 0, Figs. 4, 6, and 8; Z, the arc recess in the partof the bolster-plate, Fig. 5, into which the under part of thebolsterplate in Fig. 4 enters in order to give more bearing-surface tothe left-hand part of the plate, Fig. 4, on the axle-tree w. The dottedline above at, Fig. 7, shows the thickness of the plate, which is cutout to receive the tongue m.

0 are the ribs on the plate, Figs. 4, 6, and 8, over which the clips arebent to make a firm junction of the two parts of the plate; 9', Figs. 4,5, 6, and 8, the beds of the frictionblocks in the bolster-plate; s, theplace of the stake of the bolster. The arms of the spring may beflattened where they bear on the triotion-plates.

The operation of the spring is as follows: When the load depresses thearms of the spring, the ends, pressing still more off the bolster-plate,the torsion-leverage is regularly shortened, so that the spring bearsthe increased load or the shock from the roughness of the roads withoutso much increasing the strain on it and without the great reaction whichtakes place when there is no or not so much and so regular shortening ofthe lower arms of the springs.

Until the bolster or spring-board is very much depressed the arms of thespring, passing obliquely off of the bolster-plate, throw the strainless on the stakes and more on the bolster. When the spring iscompletely depressed, the strain is on the stakes, but at their bases.

What I claim is- An adjustable bearing-plate for vehiclesprings,consisting of two separate parts adapted to be secured to the axle-tree,each said part being provided with similar vertical side plates f,recesses g, friction-rods g, and clips 1', adapted to secure the saidrods in the said recesses, one of the said parts being also providedwith the horizontal side ribs 0 and In testimony whereof I afiix mysignature in the tongue an, adapted to rest on the top of presence oftwo witnesses. the axle-tree, and the other said part; being providedwith the recess Z, adapted to engage JEROME W. VVETMORE. 5 the saidtongue, and the clips k, adapted. to Witnesses:

be bent over the said side ribs, substantially O. V. FAULKNER,

as set forth. WALTER SCOTT.

